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Product discontinued. Successor model: NH-U9DO A3

Based on Noctua's compact NH-U9 series and fitted with the award-winning NF-B9 fan and NT-H1 thermal compound, the NH-U9DO forms a complete premium quality package that provides excellent quiet cooling performance for 4U Opteron workstations and servers. The NH-U9DO's SecuFirm™ mounting system is fully compatible with the standard backplate and makes the NH-U9DO a simple drop-in replacement for AMD stock coolers.

Caution: Please note that the cooler isn't compatible with socket G34.

If you're interested in using our coolers on AMD Opteron platforms, please don't hesitate to contact us at sales@noctua.at! Bundles can be customized for system integrators.
Details
Can be turned by 90° for optimal compatibility and positioning

Can be turned by 90° for optimal compatibility and positioning

The NH-U9DO can be installed rotated by 90° to allow for an optimal positioning of the cooler and to evade compatibility issues on dual socket mainboards.
Drop-in replacement for standard AMD coolers

Drop-in replacement for standard AMD coolers

The NH-U9DO's SecuFirm™ mounting system screws directly to the standard Socket F backplate in order to facilitate the installation process.
NF-B9 92mm premium fan

NF-B9 92mm premium fan

Featuring psychoacoustic optimizations and Noctua's premium-grade SSO-bearing, the award-winning NF-B9 is renowned for its exceptional quietness and long-term stability.
NT-H1 thermal compound

NT-H1 thermal compound

Noctua's much-acclaimed NT-H1 is a pro-grade TIM solution that provides minimum thermal resistance, excellent ease-of-use and outstanding reliability.
NH-U9DO
Cooler Specification
Sockel K8 (754, 939, 940) & Sockel F (if the hole spacing is 88.9mm)
Height (without fan)
122 mm
Width (without fan)
96 mm
Depth (without fan)
65 mm
Height (with fan)
122 mm
Width (with fan)
96 mm
Depth (with fan)
90 mm
Weight (without fan)
500 g
Weight (with fan/s)
590 g
Material
Copper (base and heat-pipes), aluminium (cooling fins), soldered joints & nickel plating
Fan compatibility
92x92x25 (2 fans can be installed)
Scope of Delivery
  • 1x NH-U9DO heatsink
  • 1x NF-B9 fan
  • Mounting-clips for 2 fans
  • Ultra-Low-Noise-Adaptor (U.L.N.A.)
  • Low-Noise-Adaptor (L.N.A.)
  • NT-H1 thermal compound
  • SecuFirm™ mounting kit for Socket F
Warranty
6 Years
FAN Specification
Model
Bearing
Rotational Speed (+/- 10%)
1600 RPM
Rotational Speed with L.N.A. (+/- 10%)
1300 RPM
Rotational Speed with U.L.N.A. (+/- 10%)
1000 RPM
Acoustical Noise
17,6 dB(A)
Voltage Range
12 V
MTTF
> 150.000 h
NH-U9DO
30.06.2010 // PC Helpforum
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NH-U9DO Review

We zijn uitgekomen bij de montage. Deze ging er gemakkelijk, een van de gemakkelijkste manier van monteren kan ik eigenlijk zelf wel stellen. Dit is vanwege de gebruikte manier van monteren, simpelweg met schroeven in de backplate. Hierdoor zit de CPU ook veel beter vast dan bij de normale manier van monteren. Deze manier komen we tegenwoordig ook steeds vaker tegen op de wat grotere koelers van tegenwoordig.
Test verdict: "Ik moet zeggen dat ik deze koelers erg prettig vind om mee te werken. Ze zijn getest op 2 moederborden, zowel de Asus KFSN4 DRE/SAS als een MSI Speedster 1 en ze zaten perfect. Tevens is de prestatie goed te noemen, hoewel ze hier op processoren zijn gebruikt die een laag verbruik hebben, hebben ze deze goed koel weten te houden." (Yannick de Koeijer, PC Helpforum)

Installation Manual (PDF)

How can I determine if the motherboard’s UEFI BIOS is overclocking my processor by default and deactivate this automatic overclocking?

Most motherboard vendors allow their overclocking-enabled products (e.g. those with Intels X- or Z-series chipsets) to run the processor at increased clock speeds by default, without requiring any user action at all. Since TDP (Thermal Design Power) limits are usually also disabled by default, this leads to the CPU exceeding the rated TDP to a varying degree, depending on the used applications and their workloads. Due to the increased heat output of the CPU, you may see higher CPU temperatures than expected.

In order to find out if your motherboard is overclocking your processor by default, please enter the UEFI BIOS and select the “advanced” or “overclocking” menu. There you should be able to find options such as “MultiCore Enhancement” (options: enabled/disabled), “CPU Ratio Apply Mode” (options: all/per core) or similar. To disable the automatic overclocking, adjust the settings either to “disabled” or “per core” and make sure that the individual multipliers match the original specifications.

In doubt, please contact your motherboard vendor for detailed instructions on how to disable this feature.

My unlocked Intel CPU is running too hot although my heatsink supports the specified TDP, what's the problem?

Intel's unlocked CPUs (K, X and C suffix) can dissipate more heat than indicated by the TDP specification if
  1. the TDP limits are extended or disabled in the motherboards' BIOS.
  2. the motherboard applies automatic overclocking by default, e.g. by raising the supply voltage of the CPU and using higher Turbo-Mode multipliers.
  3. some software creates untypical loads, e.g. Prime95 with AVX2 support and a) and/or b) apply.

This can lead to temperature issues, especially when using smaller coolers or compact cases.

The actual power draw of the processor can be monitored with software provided by the motherboard vendor or with 3rd party tools like HWInfo or HWMonitor.

If you encounter temperature issues (>90°C) and notice a higher than specified power draw, please ensure that no automatic overclocking is applied and limit the TDP to the specified value by choosing appropriate BIOS settings.

For Kaby Lake CPUs, it may also help to lower the CPU clock speed for applications that heavily use the AVX instruction set, which can lead to higher loads and power draw. This option is usually referred to as “AVX offset” and makes it possible to lower the multiplier specifically for AVX based applications without reducing performance when using other instruction sets. Depending on the quality of the CPU and the programs being used, a reduction of 2-3 steps usually gives very good results.

Please contact your motherboard vendor for details if you have trouble finding the appropriate settings in the BIOS.

All our TDP recommendations are based on thorough testing with the default values specified by Intel using popular applications such as Asus Realbench and prime95. Please note, however, that prime95 creates a particularly high load that goes beyond typical application scenarios and this leads to elevated temperatures. We thus recommend using other programs such as Realbench for checking the stability and temperatures of the CPU in realistic scenarios.

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